It's great that KSP 2 looks and sounds as it does. I just don't recall "Better graphics" and "Better sound" being at the top of anyone's list of things they wanted out of KSP2. I recall, in varying orders, the top three were Colonies, Interstellar, and Multiplayer. But I also recall, above all of these, was a desire for a clean codebase from which to build all these other new features.
KSP1, for all it's wonder and brilliance, had it's coding issues. The game was built by people unfamil